Gaya APA

L., M., Swanson, C, P. (NULL). Observing Students And Teachers Through Objective Strategies . London:: London: Allyn and Bacon; 1997.

Gaya MLA

L., McNelly,Sharon., Swanson, Carl, P.. "Observing Students And Teachers Through Objective Strategies". London:: London: Allyn and Bacon; 1997, NULL. Text.